Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e6c7f9319d196d…

MALICIOUS

PDF

80.8 KB Created: 2021-02-25 16:52:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 90dbb2adb58fabb63404bc22cd51de89 SHA-1: 46dbe9f64aa23d104edca04e1bb8aadd30d9d125 SHA-256: d8e6c7f9319d196dfdca1424d6b78feb10ccfb188bd960373dfb9adfb4ced2ea
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/strik?utm_term=emily+dickinson+poem+hope+summary PDF link annotation
    • http://gisoboxizaza.mygamesonline.org/27783848224.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/52872192277.pdfIn PDF document text
    • http://onlinetyz.xyz/67092469195uuxe6.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/neralalililotaferuwi.pdfIn PDF document text
    • http://albl.ru/40255918003ug8nv.pdfIn PDF document text
    • http://esagafow.fun/how_to_short_cite_a_statute_bluebooke711l.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/zoomer_dino_directionshmg1c.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/panda_express_allergen_menu.pdfIn PDF document text
    • http://train-home.ru/5167623658ouhk8.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/p90x_chest_and_back_workout_summary.pdfIn PDF document text
    • http://coolstudent.space/rc4_stream_cipher_and_its_variants0w5vy.pdfIn PDF document text
    • http://zabozukatipu.iblogger.org/37045981948.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://joxisuzu.rf.gd/kodulatamako.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/essential_academic_vocabulary.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/what_is_the_difference_between_molecular_biology_and_microbiology.pdfIn PDF document text
    • http://saxodanokijaj.atwebpages.com/27971371114.pdfIn PDF document text
    • http://muzafevabuma.rf.gd/kejofuwosonolow.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF229 5236 bytes
SHA-256: 8773ec2a3d3fafd684e3674ae10d6a9895244cf679903b336412b41c21b279da
font_01_sfnt_off000103c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C3 10660 bytes
SHA-256: db03d266e50d4a04c0584307c6500fe54915d583b016683c1d83b97265153405
font_02_sfnt_off000127c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C4 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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